Not able to chance font size title after update.

After updating to the latest 4.10.3 version I'm not able to chance the font size of the title.Title font size was 5.4. So now I want font size 4.0. I adjusted it to size 4.0. All looks ok. But when I close the program and start it again font size is 5.4. I want to keep the font size 4.0.. What's wrong? Any help appreciated. Thx.

I deleted the cache files from: user/appdata/roaming/mobirise/cache/. I made a backup. Just in case.I could finally change the font size from the title. Close the program. Start it again, and last chances where still there. So deleting files from the cache could solve these problems.